Abstract
On the basis of the venturi tube bubble generator, a new axial swirl bubble generator is designed, and the numerical simulation of the bubble generator with different number of three baffles is carried out by using Fluent software, and it is found that the three-lobed type is significantly better than the two-leaf type and four-leaf type in the swirl velocity and core swirl area, and the response surface optimization method is used to optimize the key structure and analyze the interaction influence. The results show that the parameter that can most affect the bubble diameter is the throat diameter, followed by the expansion angle, the contraction angle has the least effect, the optimal parameters are 21.9°, the throat diameter is 5mm, and the expansion angle is 13.8°, and the accuracy of the numerical model is verified by experimental comparative analysis, and finally the influence of gas-liquid flow on bubble size is studied with the help of high-speed camera.
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